This old proverb means that patience is something must be learned and practiced because it is'nt something which comes naturally to us. Those who master patience become more successful than those who can't.
Waiting for long term gratification is much better than temporary instant gratification because going slow and doing something right is much better than rushing and doing things half a job or worse doing it wrong and having to repeat it which will take longer than if they had waited.
Many people want something that they want it now, rushing things and don't have time to wait, that for then *time is money.
Waiting means we won't have what we want today.Being able to wait is a desirable quality.
It is diffiicult to have a behavior of high moral standard to forego instant gratification in exchange for something better at a later date. 
This is why it is a virtue and those who have these, have truly understood that it is better to wait for tomorrow to take the full reward rather than taking a small sample today.
Respect post everyone and have a good day!
